CN103178788B - A kind of low-noise amplifier biasing circuit of wide power voltage power supply - Google Patents
A kind of low-noise amplifier biasing circuit of wide power voltage power supply Download PDFInfo
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- CN103178788B CN103178788B CN201310036309.1A CN201310036309A CN103178788B CN 103178788 B CN103178788 B CN 103178788B CN 201310036309 A CN201310036309 A CN 201310036309A CN 103178788 B CN103178788 B CN 103178788B
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Abstract
The invention belongs to wireless communication electronics technical field, the low-noise amplifier biasing circuit of disclosed a kind of wide power voltage power supply, comprises a main biasing circuit, a bias stabilization feedback branch and a bias current source generating circuit. Main biasing circuit, it is current mirror type resistance feed-type circuit structure; Bias stabilization feedback circuit, it is made up of the emitter follower of dual serial cascade, is used to main biasing circuit that stable feedback current is provided; Bias current source generating circuit, it is made up of two the first parallel current sources and the second current source; Two triodes of bias stabilization feedback circuit are two complementary class casts, make the direct current pressure drop of bias stabilization feedback branch close to zero. The bias circuit construction of wide power voltage power supply of the present invention, the new approaches of proposition circuit design, have and widen normal working power voltage scope and improve the LNA linearity and noise coefficient plurality of advantages.
Description
Technical field
The invention belongs to wireless communication electronics technical field, relate to the biasing circuit of amplifier, relate in particular to a kind of wide electricityThe low-noise amplifier biasing circuit of source voltage power supply, is applied to wireless communication receiver system radio-frequency front-end low-noise amplifierBiasing circuit.
Background technology
Now, the various types of wireless communication systems including mobile communication and WLAN and technology develop rapidly, penetrateFrequently integrated circuit (RFIC) worldwide becomes the focus of university, research institute and the related industry of communicating by letter research and development. ThisThe development of a little wireless communication systems has formed the RFIC market of a rapid growth. Why radio circuit is subject to worldwideInterior concern and research are to be the Main Bottleneck of whole wireless transceiver system design due to it. At the element of radio frequency transceiverIn, the technical property requirements of RFIC has formed the ultimate challenge of RFIC. And meanwhile, the performance of market user to wireless productIt is again very harsh requiring, i.e. the requirement such as low cost, low-power consumption, small size, high-performance, and this is a huge challenge.
LNA is first module in wireless receiver system normally, is also indispensable key modules. The master of LNAWanting function is that the wireless signal of the sub-micro volt from antenna reception is amplified to a certain size, to facilitate follow-up module to enter signalRow is processed, and self introduces the little noise and non-linear of trying one's best simultaneously. This just requires LNA to have low-noise factor, high-gain and heightThe attribute of the linearity. Meanwhile, LNA is between reception antenna and frequency mixer in wireless receiver system signal path, for anti-Only local oscillation signal leaks into antenna front end from frequency mixer and causes interference, and LNA also needs to have high-isolation. SiGeHBTLNA energyEnough meet preferably the demand: have extremely low noise coefficient concurrently, the higher linearity and the higher increasing of CMOSLNA relativelyBenefit. If adopt cascade (Cascode) structure, also can there is high-isolation.
From the angle of use, because LNA is in the initiating terminal of receiver, its applied environment is spirit relativelyLive, can integrate and be formed with source antenna with reception antenna, also can be used as discrete chip and be placed on the overall core of receiverBefore sheet, can also be integrated in the overall chip internal of receiver, the power supply of diverse location may be different; Secondly be,The planning of system power management is different, gives the supply voltage possibility of LNA inconsistent; Again, in portable receiver application, battery suppliesUnder electricity condition, be subject to the impact of battery electric quantity, temperature etc., the supply voltage of LNA also has variation by a relatively large margin. Therefore design energyUnder wide power power voltage supply condition, the LNA of normal work has important practical significance, and the key that realizes this LNA isDesign is subject to supply voltage to affect little biasing circuit.
The actual biasing circuit using generally has three kinds of forms: the biasing of inductance feed-type, the biasing of resistance feed-type and double-fedElectrical bias.
A) inductance feed-type biasing: there is noiseproof feature good, the advantage that the linearity is high, but because it need to use oneOuter or the sheet internal inductance of sheet, has increased peripheral circuit complexity or chip area, and in order to reduce cost, designer is more readyUse resistance feed-type bias structure;
B) resistance feed-type biasing: without the feed inductance outside sheet or outside sheet, save peripheral circuit or chip area,But this structure can be brought the deterioration of performance, noise coefficient and the linearity are difficult to take into account, in addition the electricity of biasing circuit itselfPress pressure drop higher, be unfavorable at operation at low power supply voltage.
C) duplex feeding biasing: increase a feed path on the basis of resistance feed-type biasing, by defeated to amplifierThe compensation that enters HBT pipe base current reaches the object that improves the linearity. This feeding classification has slightly been sacrificed noise coefficient and has been exchanged forLinearity raising to a certain degree. But, because two feed leg all have higher voltage drop, be therefore also unfavorable forAt operation at low power supply voltage.
The low-noise amplifier LNA of the resistance feed-type biasing of prior art as shown in Figure 1, is the inclined to one side of LNA in dotted line frameCircuits. Biasing circuit annexation is: current source IB0 mono-termination supply voltage VDD, the other end connects biasing triode Q1'sThe base stage of colelctor electrode and biasing triode Q2; The direct ground connection of emitter stage of biasing triode Q1, one end of its base stage and resistance R 1Join, the other end of resistance R 1 is connected with the emitter stage of triode Q2 with one end of resistance R 0; The colelctor electrode of triode Q2 and electricitySource voltage VDD joins; And the other end of resistance R 0 connect LNA main amplifier input triode Q0 base stage and input with radio frequencyEnd RFIN joins.
The LNA of this traditional resistor feed-type biasing, the basic functional principle of its biasing circuit is: current source IB0 is for inclined to one sidePut triode Q1 stable current offset is provided; Triode Q1 sets up base voltage with I-V characteristic rule, is the input three of LNAThe base stage of utmost point pipe Q0 provides bias voltage; Biasing triode Q2 follows connection by emitter stage, forms the collection of biasing triode Q1Electrode is to the negative-feedback of base stage, to stablize the DC offset voltage of biasing triode Q1 base stage. Resistance R 0 forIsolationDirect current is inclined to one sidePut and radio-frequency input signals, and resistance R 1 is current-limiting resistance, with the pressure drop on balance R0, makes main amplifying triode Q0 and biasing threeThe base voltage of utmost point pipe Q1 equates.
The biasing circuit of this resistance feed-type bias type, in normal working conditions, requires supply voltage to be greater thanTransistor base-the emitter voltage of twice adds the pressure drop of current source IB0, under representative condition, is greater than 1.8V. Like this partiallyThere is the defect that normal working power voltage is high in circuits, is unfavorable for especially at operation at low power supply voltage. So, this biasingCircuit structure is can not be applied in 1.8V or more in the amplifier circuit in low noise of low voltage power supply.
Summary of the invention
The object of the invention is the weak point existing for overcoming prior art, propose the low of a kind of wide power voltage power supplyNoise amplifier biasing circuit. Do not worsening under the prerequisite of the indexs such as low-noise amplifier noise, the linearity, gain, by changingEnter resistance feed-type bias circuit construction, the property of the LNA that significantly improves resistance feed-type biasing under low supply voltage power supplyCan, thereby realize the wide power voltage power supply of this type of low-noise amplifier.
Above-mentioned purpose of the present invention realizes by the following technical solutions:
A low-noise amplifier biasing circuit for wide power voltage power supply, amplifier circuit in low noise formation comprises main electricityRoad and biasing circuit; It is characterized in that, biasing circuit is the circuit structure of wide power voltage power supply, and its circuit formation comprises oneMain biasing circuit, a bias stabilization feedback circuit and a bias current source generating circuit; Wherein:
Described bias stabilization feedback circuit, it is made up of the emitter follower of dual serial cascade, is used to main biased electricalRoad provides stable feedback current;
Described bias current source generating circuit, it is made up of two the first parallel current sources and the second current source; FirstOne end of current source and the second current source also attaches to power vd D, the main biasing circuit of the corresponding connection of the other end of the first current source,For providing the not bias current with mains voltage variations to main bias current; The corresponding connection of the other end of the second current source setoversStablize feedback circuit, for the not bias current with mains voltage variations being provided to bias stabilization feedback branch.
Annexation is: the offset side of main biasing circuit is connected with bias stabilization feedback circuit, bias stabilization feedback circuitBiasing feedback end receive the biasing feedback input end of main biasing circuit; The bias current source generating circuit of double-current source structure,A current output terminal of the first current source and the second current source, the main biasing circuit of corresponding connection and bias stabilization feedback circuitAn electric current injection end; The biasing output VB of main biasing circuit connects the offset side of the main amplifying circuit of low-noise amplifier,Be used to main amplifying circuit to provide and there is wide power voltage power supply scope and stable bias voltage VB。
Described low-noise amplifier biasing circuit, it is that described main biasing circuit comprises biasing triode Q1, limitLeakage resistance R0 and balance resistance R 1; Biasing triode Q1 colelctor electrode connects the current output terminal of the first current source IBO, the sending out of Q1 pipeEmitter grounding, the base stage of Q1 pipe connects one end of balance resistance R1, one end of the other end of balance resistance R1 and current-limiting resistance R0And connect, and meet end VB for biasing feedback end, the output that the other end of current-limiting resistance R0 is main biasing circuit.
Described low-noise amplifier biasing circuit, it is that described bias stabilization feedback circuit is by triode Q2, Q4Form two connected in series forming of emitter follower that triode Q2 and Q4 form respectively, triode Q2 emitter stage with resistance R 3One end of connecting triode Q4 base stage and resistance R 3, the other end ground connection of resistance R 3; The colelctor electrode of triode Q4 is received the second electricityStream source output terminal, this link is connected to the offset side VB of main biasing circuit as the feedback end of bias stabilization feedback circuit.
Described low-noise amplifier biasing circuit, it is that described bias current source generating circuit is by the first current sourceIB0 and the 2nd IB1 current source composition; One termination power vd D of the first current source IB0 and the 2nd IB1 current source, the first current sourceThe other end of IB0 is connected to the colelctor electrode of main biasing circuit biasing triode Q1, and the other end of the 2nd IB1 current source is received biasingStablize the ground level of feedback circuit triode Q2.
Described low-noise amplifier biasing circuit, it is two emitter-base bandgap gradings of described bias stabilization feedback circuit serial connectionFollower triode Q2 and Q4 are complementary class cast; Triode Q2 is NPN type, and triode Q4 is positive-negative-positive; Be used for making bias stabilizationThe direct current pressure drop of feedback branch is close to zero.
Described low-noise amplifier biasing circuit, it is the first current source of described bias current source generating circuitIB0 is identical with the second current source IB1 circuit structure, is current mirror type current source.
Described low-noise amplifier biasing circuit, it is described main biasing circuit, bias current source generating circuitWith the triode of bias stabilization feedback circuit be BJT type pipe or MOS type pipe.
In sum, the low-noise amplifier biasing circuit of disclosed a kind of wide power voltage power supply, is in traditional resistorOn the basis of feed-type biasing circuit, will base bias current be provided in Fig. 1 and pass through three of feedback stability base bias voltageTriode Q2, Q3 in Fig. 2 for utmost point pipe Q2, resistance R 3 and current source IB1 substitute. But be in fact to propose a kind of wide power voltageThe low-noise amplifier biasing circuit of work, comprises a main biasing circuit, a bias stabilization feedback branch and a biasingElectric current source generating circuit. Main biasing circuit, it is current mirror type resistance feed-type circuit structure; Bias stabilization feedback circuit, itEmitter follower by dual serial cascade forms, and is used to main biasing circuit that stable feedback current is provided; Bias current sources is producedRaw circuit, it is made up of two the first parallel current sources and the second current source; Two triodes of bias stabilization feedback circuitFor two class casts of complementation, make the direct current pressure drop of bias stabilization feedback branch close to zero. Wide power voltage power supply of the present inventionBias circuit construction, the new approaches of circuit design are proposed, have and widen normal working power voltage scope and improve LNAThe linearity and noise coefficient plurality of advantages.
The substantial effect of the present invention, the low-noise amplifier biasing circuit of wide power voltage power supply compared with prior artThere is following substantial advantage:
1, the present invention introduces bias stabilization feedback circuit in resistance feed-type biasing circuit, to stablize the negative of bias voltageFeedback branch version, becomes by source follower the source electrode without direct current pressure drop being become by two source follower cascaded series and followsWith device, increase substantially the tolerance performance of biasing circuit to low-voltage.
2, the present invention produces with the bias current sources of first current source and second current source formation in biasing circuitCircuit, the DC bias current of source follower no longer equals the base current sum of triode Q0 and Q1, makes source followerSource electrode input impedance controlled, be conducive to low-noise amplifier and take into account noise coefficient and linearity performance.
3, biasing circuit of the present invention is being realized under the prerequisite of wide power voltage power supply target, takes into account and improves low noise amplificationDevice linearity performance, meanwhile, effectively improves the noise-figure performance of low-noise amplifier, can be widely used at 1.8V orPerson is the amplifier circuit in low noise of low voltage power supply more.
Brief description of the drawings
Fig. 1 is the resistance feed-type low-noise amplifier biasing circuit schematic diagram of prior art;
In Fig. 1; 11-main amplifying circuit, 12-biasing circuit.
Fig. 2 a is the low-noise amplifier biasing circuit schematic block diagram of the wide power voltage power supply of first embodiment of the invention;
Fig. 2 b is the low-noise amplifier biasing circuit schematic diagram of the wide power voltage power supply of second embodiment of the invention;
In Fig. 2 a and Fig. 2 b; 21-main amplifying circuit, 22-main biasing circuit, 221-main biasing circuit, 222-biasingStablize feedback circuit, 223-bias current source generating circuit, RFin-RF signal input end, the output of RFout-radiofrequency signalEnd, VBc-Cascode transistor biasing voltage.
Fig. 3 is the low-noise amplifier biasing circuit embodiment signal of the wide power voltage power supply of second embodiment of the inventionIn Fig. 3; 31-main amplifying circuit, 32-main biasing circuit, 321-main biasing circuit, 322-bias stabilization feedback circuit,323-bias current source generating circuit.
Fig. 4 a is the low-noise amplifier minimum power supply voltage, simulation curve based on the biasing circuit of prior art shown in Fig. 1Schematic diagram;
Fig. 4 b is the low-noise amplifier minimum power supply voltage, simulation curve schematic diagram based on Fig. 2 b biasing circuit of the present invention;
In Fig. 4 a and Fig. 4 b: GTdB10-power gain, NFdB10-noise coefficient.
Fig. 5 is the noise coefficient index of the low-noise amplifier based on prior art biasing circuit shown in the present invention and Fig. 1Simulation comparison experiment schematic diagram.
Fig. 6 a is the input third order intermodulation point IIP3 of low-noise amplifier based on the biasing circuit of prior art shown in Fig. 1The simulation experiment result schematic diagram.
Fig. 6 b is the emulation experiment of the input third order intermodulation point IIP3 of the low-noise amplifier based on biasing circuit of the present inventionResult schematic diagram.
Detailed description of the invention
The low-noise amplifier biasing of the wide power voltage power supply to the present invention's proposition below in conjunction with accompanying drawing and embodimentCircuit elaborates:
The first embodiment
Fig. 2 a illustrates the low-noise amplifier biasing circuit schematic block of the wide power voltage power supply of first embodiment of the inventionFigure. Low-noise amplifier is made up of main amplifying circuit 21 and biasing circuit 22. Biasing circuit 22 is the inclined to one side of wide power voltage power supplyCircuits, comprises main biasing circuit 221, bias stabilization feedback circuit 222 and bias current source generating circuit 223. Main biased electricalThe offset side on road 221 is connected with bias stabilization feedback circuit 222, and the bias stabilization feedback of bias stabilization feedback circuit 222 is receivedThe biasing feedback input end of main biasing circuit 221. Bias current source generating circuit 223 is double-current source formation, two current sourcesRespectively there is a current output terminal, the corresponding electric current injection end that connects main biasing circuit 221 and bias stabilization feedback circuit 222. MainThe biasing output VB of biasing circuit 221 connects the offset side of the main amplifying circuit 21 of low-noise amplifier, is used to main amplificationCircuit provides has wide power voltage power supply scope and stable bias voltage VB。
The second embodiment
Fig. 2 b provides the low-noise amplifier biasing circuit principle of the wide power voltage power supply of second embodiment of the inventionFigure, it is the pipe level circuit diagram of the further refinement of low-noise amplifier of Fig. 2 a wide power voltage power supply. With the circuit structure of Fig. 2 aBecome identical, the low-noise amplifier of the wide power voltage power supply of the second embodiment is by 22 groups of main amplifying circuit 21 and biasing circuitsBecome. Biasing circuit 22 is biasing circuits of wide power voltage power supply, and it comprises main biasing circuit 221, bias stabilization feedback circuit222 and bias current source generating circuit 223. Referring to Fig. 2 b, main biasing circuit 221 comprises biasing triode Q1, resistance R 1 and R0.Bias stabilization feedback circuit 222 comprises biasing triode Q2 and Q4, resistance R 3. Bias current source generating circuit 223 comprises firstCurrent source IB0 and the second current source IB1. A termination power vd D of the first current source IB0 and the second current source IB1, the first electric currentThe other end of source IB0 connects the biasing triode Q1 colelctor electrode of main biasing circuit and the biasing three of bias stabilization feedback circuit 222Utmost point pipe Q2 base stage; The other end of the second current source IB1 connect bias stabilization feedback circuit 222 feedback triode Q4 colelctor electrode andThe tie point VB of main biasing circuit resistance R 1 one end and resistance R 0 one end, the base stage phase of the other end of resistance R 1 and triode Q1Connect, the input triode Q0 base stage of the other end of resistance R 0 and LNA main amplifying circuit is also joined with RF signal input end RFin;The grounded emitter of biasing triode Q1; The colelctor electrode of triode Q2 and power vd D join.
The colelctor electrode of the input triode pipe Q0 of LNA main amplifying circuit is connected with the emitter stage of output triode Q3, inputThe base stage of triode pipe Q0 connects the RF signal input end RFin of LNA, and the base stage of output triode Q3 connects ... VBC, defeatedThe colelctor electrode utmost point that goes out triode Q3 connects one end of load Zload, and this link is the output RFout of LNA main amplifying circuit.
The operation principle of the low-noise amplifier biasing circuit of the second embodiment wide power voltage power supply is as follows: bias currentThe biasing triode Q1 that the current source IB0 of source generating circuit 223 is main biasing circuit 221 provides stable electric current to inject, simultaneouslyCurrent source IB1 provides stable bias voltage by resistance R 1 for biasing triode Q1; Bias current source generating circuit 223 electric currentsSource IB0 is that the emitter follower triode Q2 of bias stabilization feedback circuit 222 injects stable bias current; Current source IB1 givesEmitter follower triode Q4 colelctor electrode injects stable electric current; Two emitter follower triode Q2 and Q4 be for being connected in series,Two emitter follower cascades form the negative-feedback of triode Q1 colelctor electrode to base stage, to stablize the base voltage of offset Q1.Triode Q2 is NPN type triode, and triode Q4 is positive-negative-positive triode, and the emitter follower of two serial connections is realized complementary. MainThe resistance R 0 of biasing circuit 221 plays metering function, and by balance resistance R1, balance main amplifier 21 amplifies triode Q0 base stageCurrent flowing resistance R0 and the pressure drop that produces, amplifying triode Q0 equates with the base voltage of biasing triode Q1, makes main biasingCircuit and radio-frequency input signals amplifier tube Q0 DC power minimum, obtain best wide power voltage and low-power consumption effect. ResistanceOne end of R3 connects the emitter-base bandgap grading of emitter follower triode Q2, the other end ground connection of resistance R 3, and resistance R 3 is emitter followers threeThe emitter-base bandgap grading load of utmost point pipe Q2, is used to the base stage of emitter follower triode Q4 that stable configuration voltages is provided. Main biasing circuit221 biasing triode Q1 set up base voltage according to I-V characteristic rule, provide wide power electricity for LNA amplifies input triode Q0The bias voltage V of pressure, low-power consumptionB。
The 3rd embodiment
Fig. 3 provides the low-noise amplifier biasing circuit schematic diagram of the wide power voltage power supply of the embodiment of the present invention; As Fig. 3Shown in, described main biasing circuit 321 is by triode Q1, and resistance R 0, R1 and R4 form. Wherein triode Q1 advises with I-V characteristicRule is set up base voltage, provides bias voltage for LNA amplifies input triode; Current-limiting resistance R0 is for exporting main biasing circuitThe current limliting of direct current and the obstruct to radio-frequency input signals, and balance resistance R1 is used for the pressure drop on balance resistance R0, thus makeAmplifying triode Q0 equates with the base voltage of biasing triode Q1; Resistance R 4 one end connect the second current source M1, and the other end connectsThe tie point VB end of connecting resistance R0 and R1, for when the high frequency, increases the input impedance of biasing circuit, to reduce biasing circuit pairThe impact of LNA noise coefficient. In the time of low frequency, resistance R 4 also can increase the input impedance of biasing circuit and affect the linearity of LNACan, need to be for the value of the requirement compromise consideration resistance R 4 of noise coefficient and the linearity, in the 3rd embodiment, as excellentChoosing, resistance R 4 values are 11K ohm.
Described bias stabilization feedback circuit 322 is made up of triode Q2, Q4 and resistance R 3. Wherein triode Q2, Q4 areTwo source followers, triode Q2 is NPN type triode, and triode Q4 is positive-negative-positive triode, two source follower stageConnection forms the negative-feedback of triode Q1 colelctor electrode to base stage, to stablize base voltage. Resistance R 3 is source follower transistor Q2Load, thereby by the size of regulating resistance R3 can regulate the gain of source follower regulate negative-feedback stablize branch road insteadFeedback intensity.
Described bias current generating circuit 323 is made up of metal-oxide-semiconductor M0, M1 and M2 and Iref, and wherein Iref is electric currentReference source circuit, the reference current of its generation and supply voltage, temperature have nothing to do, or are directly proportional to temperature. Reference current passes through MOSPipe M0-M1 current mirror amplifies, and forms stable bias current, and main biasing circuit 221 is setovered triode Q1 according to I-V characteristic ruleSet up base voltage, provide the bias voltage V of wide power voltage, low-power consumption for LNA amplifies input triode Q0B。
Cascode type source negative feedback and the LNA of the biasing circuit of the wide power voltage power supply in Fig. 2 a, Fig. 2 b and Fig. 3Middle main amplifying circuit 21 is connected with 31 application, the low-noise amplifier biasing of the wide power voltage power supply that the present invention proposes justCircuit can obtain good effect. And be widely used in 1.8V or the low-noise amplifier electricity of low voltage power supply moreRoad.
Prior art adopts in the LNA of traditional resistor feed-type biasing circuit, the calculating formula of the minimum of a value of supply voltage:≈2×0.8+0.2=1.8V；
The low-noise amplifier minimum power supply voltage, the simulation experiment result of the biasing circuit of prior art shown in Fig. 1 is as Fig. 4 a instituteShow. Use cadencespectreRF emulation, based on the low-noise amplifier of prior art resistance feeding type biasing, it is minimumOperating voltage is about 1.6V, and supply voltage just can obtain good performance in the time that 1.8V is above.
And the minimum of a value calculating formula of the supply voltage of the low-noise amplifier biasing circuit of wide power voltage power supply of the present invention:≈0.8+0.2=1.0V。
And the supply voltage experimental result of the low-noise amplifier biasing circuit of wide power voltage power supply of the present invention is as Fig. 4 bShown in. Based on the low-noise amplifier of biasing circuit of the present invention, its minimum operating voltage is about 1.0V, is 1.2V at supply voltageWhen above, can obtain optimum performance, with respect to the former, significantly reduce the minimum work electricity of the LNA of resistance feed-type biasingPress, effectively widen the supply voltage scope of the normal work of LNA.
Above-mentioned analysis is known, and the present invention can significantly reduce the minimum operating voltage of the LNA of resistance feed-type biasing, applicationThe supply voltage scope of LNA of the present invention is widened 1.0V. Can be widely used in requirement and widen supply voltage working rangeCircuit.
Fig. 5 figure provides the noise coefficient of the low-noise amplifier based on prior art biasing circuit shown in the present invention and Fig. 1The simulation comparison experiment schematic diagram of index. Fig. 6 a provides low-noise amplifier based on the biasing circuit of prior art shown in Fig. 1The experimental result schematic diagram of emulation input third order intermodulation point IIP3, Fig. 6 b provides the low noise amplification based on biasing circuit of the present inventionThe experimental result schematic diagram of the emulation input third order intermodulation point IIP3 of device. Emulation testing condition: frequency input signal 1575MHz,Power-30dBm. Third order intermodulation point IIP3 and the important parameter that is the evaluation circuit linearity, in cadencespectreRF emulationUnder environment, the low-noise amplifier of the resistance feeding type biasing of prior art, its noise coefficient NF in central task frequency isWhen 1.575GHz, be about 1.10dB(as shown in Figure 5), input third order intermodulation point IIP3 is-5.71dBm(as shown in Figure 6 a); And baseIn the low-noise amplifier of biasing circuit of the present invention, its noise coefficient NF is about in the time that central task frequency is 1.575GHz0.91dB(is as shown in Figure 5), input third order intermodulation point IIP3 is-2.72dBm(as shown in Figure 6 b), with respect to the former, the present inventionThe low-noise amplifier of biasing circuit ensureing under the condition that the linearity increases, noise-figure performance have 0.19dB obviouslyImprove. In sum, the low-noise amplifier biasing circuit of wide power voltage power supply of the present invention, is realizing wide power voltage workDo under the prerequisite of target, take into account and improve low-noise amplifier linearity performance, meanwhile, effectively improve making an uproar of low-noise amplifierSonic system is counted performance.
Protection scope of the present invention, is not limited to embodiments described herein. As long as various variations are in appended rightRequire to limit and definite the spirit and scope of the present invention in, these variations are apparent, all utilize the present invention to conceiveExample all at the row of protection.
Claims (6)
1. a low-noise amplifier biasing circuit for wide power voltage power supply, amplifier circuit in low noise formation comprises main circuitAnd biasing circuit; It is characterized in that, biasing circuit is the circuit structure of wide power voltage power supply, and its circuit formation comprises a masterBiasing circuit, a bias stabilization feedback circuit and a bias current source generating circuit; Wherein:
Described bias stabilization feedback circuit, it is made up of the emitter follower of dual serial cascade, is used to main biasing circuit to carryFor stablizing feedback current;
Described bias current source generating circuit, it is made up of two the first parallel current sources and the second current source; The first electric currentOne end of source and the second current source also attaches to power vd D, the main biasing circuit of the corresponding connection of the other end of the first current source, forThe not bias current with mains voltage variations is provided to main biasing circuit; The corresponding bias stabilization that connects of the other end of the second current sourceFeedback circuit, for providing the not bias current with mains voltage variations to bias stabilization feedback circuit;
Annexation is: the offset side of main biasing circuit is connected with bias stabilization feedback circuit, bias stabilization feedback circuit partiallyPut feedback end and receive the biasing feedback input end of main biasing circuit; The bias current source generating circuit of double-current source structure, firstA current output terminal of current source and the second current source, corresponding of connecting main biasing circuit and bias stabilization feedback circuitElectric current injection end; The biasing output VB of main biasing circuit connects the offset side of the main amplifying circuit of low-noise amplifier, forFor providing, main amplifying circuit there is wide power voltage power supply scope and stable bias voltage VB。
2. low-noise amplifier biasing circuit according to claim 1, is characterized in that, described main biasing circuit comprises partiallyPut triode Q1, current-limiting resistance R0 and balance resistance R 1; It is defeated that biasing triode Q1 colelctor electrode connects the electric current of the first current source IBOGo out end, the grounded emitter of Q1 pipe, the base stage of Q1 pipe connects one end of balance resistance R1, the other end of balance resistance R1 and current limlitingOne end of resistance R 0 also connects, and meets end VB for biasing feedback end, the output that the other end of current-limiting resistance R0 is main biasing circuit.
3. low-noise amplifier biasing circuit according to claim 1, is characterized in that, described bias stabilization feedback electricityRoute triode Q2, Q4 and resistance R 3 form, two connected in series forming of emitter follower that triode Q2 and Q4 form respectively,One end of triode Q2 emitter stage connecting triode Q4 base stage and resistance R 3, the other end ground connection of resistance R 3; The collection of triode Q4Electrode is received the second current source output, and this link is connected to main biasing circuit as the feedback end of bias stabilization feedback circuitOffset side VB.
4. low-noise amplifier biasing circuit according to claim 1, is further characterized in that, described bias current sources is producedRaw circuit is made up of the first current source IB0 and the second current source IB1; A termination of the first current source IB0 and the second current source IB1Power vd D, the other end of the first current source IB0 is connected to the colelctor electrode of main biasing circuit biasing triode Q1, the second current sourceThe other end of IB1 is received the base stage of bias stabilization feedback circuit triode Q2.
5. low-noise amplifier biasing circuit according to claim 3, is further characterized in that: described bias stabilization feedbackTwo emitter follower triode Q2 and the Q4 of circuit serial connection are complementary class cast; Triode Q2 is NPN type, and triode Q4 isPositive-negative-positive, is close to zero for the direct current pressure drop that makes bias stabilization feedback circuit.
6. according to the low-noise amplifier biasing circuit described in claim 1 or 4, it is characterized in that described bias current sourcesThe the first current source IB0 that produces circuit is identical with the second current source IB1 circuit structure, is current mirror type current source.
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| CN201310036309.1A CN103178788B (en) | 2013-01-29 | 2013-01-29 | A kind of low-noise amplifier biasing circuit of wide power voltage power supply |
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| CN201310036309.1A CN103178788B (en) | 2013-01-29 | 2013-01-29 | A kind of low-noise amplifier biasing circuit of wide power voltage power supply |
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| CN103178788B true CN103178788B (en) | 2016-05-04 |
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| CN201310036309.1A Active CN103178788B (en) | 2013-01-29 | 2013-01-29 | A kind of low-noise amplifier biasing circuit of wide power voltage power supply |
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| US9954496B2 (en) * | 2015-12-21 | 2018-04-24 | Texas Instruments Incorporated | Mitigating amplifier pop noise |
| CN108566167B (en) * | 2016-09-26 | 2023-05-16 | 深圳市华讯方舟卫星通信有限公司 | Low noise amplifying circuit |
| CN108809259B (en) * | 2017-05-05 | 2022-03-11 | 中芯国际集成电路制造(上海)有限公司 | Power amplifier circuit and method of forming the same |
| CN107332520B (en) * | 2017-07-24 | 2024-03-19 | 尚睿微电子（上海）有限公司 | Bias circuit and power amplification circuit |
| CN114995576B (en) * | 2022-05-09 | 2023-09-15 | 贵州振华风光半导体股份有限公司 | Bidirectional self-bias bipolar current mirror circuit adapting to low-voltage operation |
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| CN102394572A (en) * | 2011-10-14 | 2012-03-28 | 苏州中科半导体集成技术研发中心有限公司 | High-linearity low noise amplifier and design method thereof |
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| CN1103519A (en) * | 1994-08-22 | 1995-06-07 | 高林 | Electric signal amplifier |
| US6049253A (en) * | 1998-01-29 | 2000-04-11 | Matsushita Electric Industrial Co., Ltd. | Operational amplifier |
| CN1799193A (en) * | 2002-12-09 | 2006-07-05 | 皇家飞利浦电子股份有限公司 | Amplifier circuit having an impedance-controllable bias-boosting circuit |
| CN102386865A (en) * | 2011-09-22 | 2012-03-21 | 四川和芯微电子股份有限公司 | Operational amplification circuit and system |
| CN102394572A (en) * | 2011-10-14 | 2012-03-28 | 苏州中科半导体集成技术研发中心有限公司 | High-linearity low noise amplifier and design method thereof |
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